001/*
002 * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved.
003 *
004 * Project and contact information: http://www.cascading.org/
005 *
006 * This file is part of the Cascading project.
007 *
008 * Licensed under the Apache License, Version 2.0 (the "License");
009 * you may not use this file except in compliance with the License.
010 * You may obtain a copy of the License at
011 *
012 *     http://www.apache.org/licenses/LICENSE-2.0
013 *
014 * Unless required by applicable law or agreed to in writing, software
015 * distributed under the License is distributed on an "AS IS" BASIS,
016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017 * See the License for the specific language governing permissions and
018 * limitations under the License.
019 */
020
021package cascading.flow.stream.duct;
022
023/**
024 *
025 */
026public class CloseReducingDuct<Group, Incoming, Outgoing> extends Duct<Incoming, Outgoing> implements CloseWindow, Reducing<Group, Outgoing>
027  {
028  public CloseReducingDuct( Duct<Outgoing, ?> next )
029    {
030    super( next );
031    }
032
033  @Override
034  public void receive( Duct previous, Incoming incoming )
035    {
036    // do nothing
037    }
038
039  @Override
040  public void startGroup( Duct previous, Group group )
041    {
042    }
043
044  @Override
045  public void completeGroup( Duct previous, Outgoing outgoing )
046    {
047    next.receive( previous, outgoing );
048    }
049  }